Method of manufacturing covered hinges



Aug. 6, 1929. c. s. PARSONS METHOD OF MANUFACTUR ING COVERED HINGES Filed April 20, 1925 A TTORNE Y.

Patented Aug. 6, 1929.

UNITED STATES GARL B. FEARSONS, F DETROIT, MICHIGAN,

ASSIGNOR 'IO MOTOR PRODUCTS CORPORA- TIOIN', OF DETROIT, MICHIGAN, A CORPORATION OF NEW YORK.

METHOD OF MANUFACTURING COVERED HINGES.

Application filed April 20,

My invention relates to an improved method of manufacturing a covered hinge and securing the cover plate to one of the hinge butts.

I11 the manufacture of covered hinges of the character hereinafter described the cover plate while mounted upon the hinge pivot is also preferably permanently secured to one of the hinge butts and this is generally accomplished. by spot welding the two together. As a result of the welding operation a certain percentage of the stock is damaged. It is the general practice to weld the cover plate to its hinge butt before the two hinge butts are assembled and this necessitates a preliminary assembly of the cover plate and the hinge butt to which it is to be secured prior to the welding thereof in order that the hinge pin openings therethrough will align. Following the welding operation and the cooling of the metal, the covered hinge butt and the cooperating hinge butt are assembled to form the hinge.

I provide a simple, inexpensive and expeditious method of manufacturing such a covered hinge and fastening the cover plate to one of the hinge butts which does away with the welding operation, and its attending difficulties and natural losses and provides a secure permanent connection between the cover plate and the hinge butt which it superimposes. In the drawings I have shown in the several figures the hinge structure at successive stages in the various steps of my improved process of manufacture.

In the drawings:

Fig. 1 is a side elevation of the cover plate.

P Fig. 2 is a side elevation of the female member of the hinge structure illustrated.

Fig. 3 is a side elevation of the male hinge butt.

Fig. lis a side elevation of the hinge pivot pin.

Fig. 5 is a perspective of the hinge butt with the cover plate mounted thereon.

Fig. 6 is a vertical sectional View through the assembled hinge structure prior to the securing of the cover plate to the hinge butt upon which it is mounted.

1925. Serial No. 24,441.

Fig. 7 is a view taken on the same section line as Fig. (3 illustrating the fastening of the cover plate to the hinge butt upon which it is mounted.

Fig. 8 is a. front elevation of the hinge butt and cover plate secured together.

Fig. 9 is a side elevation of the complete hinge assembly.

My invention relates to that class of hinges in which a suitable cover plate adapted to enclose the hinge jointis permanently secured to one of the hinge butts. This cover plate is preferably of channeled sheet metal and the hinge butt upon which it mounted is disposed within the channel of the cover plate. The covered hinge butt and the coop rating hinge butt are secured together by the usual hinge pin to complete the hinge assembly.

I have illustrated my invention in connection with the hinge slightly curved at the end and the female hinge member 10 is shown in side elevation in Fig. 2 and the male hinge butt 12 is shown in side elevation in Fig. 3. In Fig. l I have shown in side elevation a sheet metal cover plate 14 having a hood 16 at one end and binge pin apertures 18. This cover plate has side flanges 20 which are here shown as continuations of the hood 16. The cover plate 1st is so fastened as to receive the female hinge butt 10 with the eyes of the knuckle member in alignment with the apertures 18 through the opposed sides of the hinge 16.

In ordinary practice, the female hinge butt is assembled with the cover plate and the pin is inserted through the registering pivot pin openings to hold these members in the proper position, and the two parts are then spot welded together. After the covered hinge butt has cooled the two hinge butts are then. assembled to complete the construction of the hinge. I vary this method of procedure in that I assemble the two hinge butts and the cover plate upon the hinge pin 22 as shown in Fig. 5, and then proceed to fasten the cover plate to the hinge butt which it super-imposes.

To accomplish this, I press a lug 24 from the body of the hinge butt 10 through the cover plate 14 to pierce its own way through such cover plate, punching out a disc theretil) from and in turn filling the opening it creates as shown in Fig. 7. This operation may be performed in the ordinary punch press by means of a suitable punch 26 having a limited range of movement as shown in Fig. 7 with respect to a die 28. It will be observed that the hinge butt 10 is of considerable greater thickness than the juxtaposed cover plate, and therefore a lug Qet while projecting entirely through the cover plate remains an inte ralpart of the butt 10 from which it was formed, and serves to permanently secure the cover plate to the butt member upon which it is mounted and prevents any slippage of the cover plate with respect to the hinge member upon which it is mounted.

' The cover plate is then swaged about the hinge butt 10 upon the back and at the sides and the screw apertures 30 are formed in the covered hinge butt. Obviously these screw apertures 30 may be formed at the same time the lug 24 is pierced through the cover plate 14. The hinge is now polished and the operation is complete.

\Vhat I claim is: Q

1. The method of manufacturing a covered hinge which consists in assembling a pair of COOpltltillg hinge butts upon a pivot pin to form a hinge, providing a relatively thin channeled cover plate for one of said hinge butts having a hood to enclose the hinge joint, mounting said cover plate upon the hinge pivot to superimpose one of the hinge butts and with its hood enclosing the hinge joint and punching a lug from the body of the hinge butt upon which the cover plate is mounted into said cover plate. to pierce its own opening therethrough and to completely fill such opening flush with the outer surface of the cover plate to secure the cover plate thereto.

2. That method of securing a relatively thick metal cover plate to a relatively thin metal back plate which consists in juxtaposing the plates, punching :1. lug from the body of the thick plate through the thin plate to completely fill the opening formed thereby in the thin plate and terminating flush with the outer surface thereof which lug remains an integral part of the thick plate and secures the plates together.

In testimony whereof, I sign this speeilication.

CARL B. PARSONS. 

